Bilyk Z. Method and means of control to determine the direction of point sources of gamma radiation

The object of study - the interaction of gamma-ray point sources with the substance that carries information about the direction of radiation. The aim - to improve the accuracy Identification of direction in space to constant and pulsed gamma source through the use of the boundaries between the maximum and minimum thickness asymmetric absorber and sinks given fixed geometry. Methods - graphic, numeric, based on the use of exponential weakening gamma rays substance measurement theory and statistical theory of errors, circuit and systems engineering. Equipment - asymmetric and ball absorbers with four multichannel analyzer pulses of gamma radiation operating simultaneously the spectrometric mode. Theoretical and practical results - developed method can improve the accuracy of measuring the direction by order of magnitude greater; confirmed by measurement of deviation of the developed physical and mathematical models take into account the thickness deviation absorber from optimum thickness of the filter and the error of direction in space does not exceed 16 °. Novelty - the method of determining the direction on the source of gamma-ray using border between between the maximum and minimum thickness asymmetric absorber; the effect of increasing the size of the scattering of gamma rays in passing along copper-lead surface; improved physical and mathematical model that connects the location of the source of gamma-ray with thickness absorber and certain ratios of signals from the detectors behind absorber; further developed method for determining the direction of gamma-ray point sources constant and pulsed type in space, which allows you to get the signal from the detector located in absorber with different attenuation to the signal from the detector, which is located in absorber with constant attenuation and the signal from the detectors each to another and compare this value with the calibration data for energy gamma-ray sources, determined to open the detector located and provides an opportunity to identify direction of gamma-ray any energy. The degree of implementation - Kharkiv National University V.N. Karazin, State Institution "Institute of Medical Radiology S.P. Grigorieva National Academy of Medical Sciences of Ukraine ", Faculty of military training behalf of the Verkhovna Rada of Ukraine National technical university "Kharkiv polytechnic institute". Scope - control and measurement of ionizing radiation.